Official Description by The CW for Supergirl 4.21: “Kara comes face to face with Red Daughter and the two engage in an epic battle. Determined to find a way to extract the Harun-El, Lena turns to an unlikely source for help – Lillian Luthor. Meanwhile, Alex realizes she’s missing parts of her memory, and Brainy, Nia, and J’onn set out to track down aliens who have been abducted by Lex. Guest Stars include Azie Tesfai (Kelly Olsen), Andrea Brooks (Eve Tessmacher), April Parker Jones (Colonel Lauren Haley), Helen Slater (Eliza Danvers), Bruce Boxleitner (President Baker), Brenda Strong (Lillian Luthor), Robert Baker (Otis Graves), Izabela Vidovic (Young Kara), Olivia Nikkanen (Young Alex), Mark Krysko (Head Guard), Al McFoster (Secret Service Agent), J.C. Roy (Guard 1), Sterling Schneider (Greta), and Colby Wilson (Guard 2).”
Supergirl stars Melissa Benoist (Kara Danvers/Supergirl), Chyler Leigh (Alex Danvers), Mehcad Brooks (James Olsen), David Harewood (J’onn J’onzz/Martian Manhunter), Jesse Rath (Querl Dox/Brainiac-5), Katie McGrath (Lena Luthor), Nicole Maines (Nia Nal), and Sam Witwer (Ben Lockwood). STORY BY: Lindsay Sturman. WRITTEN BY: Gabriel Llanas and Eric Carrasco. DIRECTED BY: Alexis Ostrander.
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